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ZipHelper (POI API Documentation)
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org.apache.poi.openxml4j.opc.internal</FONT>
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Class ZipHelper</H2>
<PRE>
java.lang.Object
  <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.poi.openxml4j.opc.internal.ZipHelper</B>
</PRE>
<HR>
<DL>
<DT><PRE>public final class <B>ZipHelper</B><DT>extends java.lang.Object</DL>
</PRE>

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<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/openxml4j/opc/internal/ZipHelper.html#READ_WRITE_FILE_BUFFER_SIZE">READ_WRITE_FILE_BUFFER_SIZE</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Buffer to read data from file.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;java.util.zip.ZipEntry</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/openxml4j/opc/internal/ZipHelper.html#getContentTypeZipEntry(org.apache.poi.openxml4j.opc.ZipPackage)">getContentTypeZipEntry</A></B>(<A HREF="../../../../../../org/apache/poi/openxml4j/opc/ZipPackage.html" title="class in org.apache.poi.openxml4j.opc">ZipPackage</A>&nbsp;pkg)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Retrieve the Zip entry of the content types part.</TD>
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<CODE>static&nbsp;java.util.zip.ZipEntry</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/openxml4j/opc/internal/ZipHelper.html#getCorePropertiesZipEntry(org.apache.poi.openxml4j.opc.ZipPackage)">getCorePropertiesZipEntry</A></B>(<A HREF="../../../../../../org/apache/poi/openxml4j/opc/ZipPackage.html" title="class in org.apache.poi.openxml4j.opc">ZipPackage</A>&nbsp;pkg)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Retrieve the zip entry of the core properties part.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/openxml4j/opc/internal/ZipHelper.html#getOPCNameFromZipItemName(java.lang.String)">getOPCNameFromZipItemName</A></B>(java.lang.String&nbsp;zipItemName)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Convert a zip name into an OPC name by adding a leading forward slash to
 the specified item name.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/openxml4j/opc/internal/ZipHelper.html#getZipItemNameFromOPCName(java.lang.String)">getZipItemNameFromOPCName</A></B>(java.lang.String&nbsp;opcItemName)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Convert an OPC item name into a zip item name by removing any leading
 forward slash if it exist.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;java.net.URI</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/openxml4j/opc/internal/ZipHelper.html#getZipURIFromOPCName(java.lang.String)">getZipURIFromOPCName</A></B>(java.lang.String&nbsp;opcItemName)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Convert an OPC item name into a zip URI by removing any leading forward
 slash if it exist.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;java.util.zip.ZipFile</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/openxml4j/opc/internal/ZipHelper.html#openZipFile(java.io.File)">openZipFile</A></B>(java.io.File&nbsp;file)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Opens the specified file as a secure zip, or returns null if no 
  such file exists</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;java.util.zip.ZipFile</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/openxml4j/opc/internal/ZipHelper.html#openZipFile(java.lang.String)">openZipFile</A></B>(java.lang.String&nbsp;path)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Retrieve and open as a secure zip file with the specified path.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="../../../../../../org/apache/poi/openxml4j/util/ZipSecureFile.ThresholdInputStream.html" title="class in org.apache.poi.openxml4j.util">ZipSecureFile.ThresholdInputStream</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/openxml4j/opc/internal/ZipHelper.html#openZipStream(java.io.InputStream)">openZipStream</A></B>(java.io.InputStream&nbsp;stream)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Opens the specified stream as a secure zip</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/openxml4j/opc/internal/ZipHelper.html#verifyZipHeader(java.io.InputStream)">verifyZipHeader</A></B>(java.io.InputStream&nbsp;stream)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Verifies that the given stream starts with a Zip structure.</TD>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<A NAME="READ_WRITE_FILE_BUFFER_SIZE"><!-- --></A><H3>
READ_WRITE_FILE_BUFFER_SIZE</H3>
<PRE>
public static final int <B>READ_WRITE_FILE_BUFFER_SIZE</B></PRE>
<DL>
<DD>Buffer to read data from file. Use big buffer to improve performaces. the
 InputStream class is reading only 8192 bytes per read call (default value
 set by sun)
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.poi.openxml4j.opc.internal.ZipHelper.READ_WRITE_FILE_BUFFER_SIZE">Constant Field Values</A></DL>
</DL>

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<A NAME="getCorePropertiesZipEntry(org.apache.poi.openxml4j.opc.ZipPackage)"><!-- --></A><H3>
getCorePropertiesZipEntry</H3>
<PRE>
public static java.util.zip.ZipEntry <B>getCorePropertiesZipEntry</B>(<A HREF="../../../../../../org/apache/poi/openxml4j/opc/ZipPackage.html" title="class in org.apache.poi.openxml4j.opc">ZipPackage</A>&nbsp;pkg)</PRE>
<DL>
<DD>Retrieve the zip entry of the core properties part.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../../../org/apache/poi/openxml4j/exceptions/OpenXML4JException.html" title="class in org.apache.poi.openxml4j.exceptions">OpenXML4JException</A></CODE> - Throws if internal error occurs.</DL>
</DD>
</DL>
<HR>

<A NAME="getContentTypeZipEntry(org.apache.poi.openxml4j.opc.ZipPackage)"><!-- --></A><H3>
getContentTypeZipEntry</H3>
<PRE>
public static java.util.zip.ZipEntry <B>getContentTypeZipEntry</B>(<A HREF="../../../../../../org/apache/poi/openxml4j/opc/ZipPackage.html" title="class in org.apache.poi.openxml4j.opc">ZipPackage</A>&nbsp;pkg)</PRE>
<DL>
<DD>Retrieve the Zip entry of the content types part.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getOPCNameFromZipItemName(java.lang.String)"><!-- --></A><H3>
getOPCNameFromZipItemName</H3>
<PRE>
public static java.lang.String <B>getOPCNameFromZipItemName</B>(java.lang.String&nbsp;zipItemName)</PRE>
<DL>
<DD>Convert a zip name into an OPC name by adding a leading forward slash to
 the specified item name.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>zipItemName</CODE> - Zip item name to convert.
<DT><B>Returns:</B><DD>An OPC compliant name.</DL>
</DD>
</DL>
<HR>

<A NAME="getZipItemNameFromOPCName(java.lang.String)"><!-- --></A><H3>
getZipItemNameFromOPCName</H3>
<PRE>
public static java.lang.String <B>getZipItemNameFromOPCName</B>(java.lang.String&nbsp;opcItemName)</PRE>
<DL>
<DD>Convert an OPC item name into a zip item name by removing any leading
 forward slash if it exist.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>opcItemName</CODE> - The OPC item name to convert.
<DT><B>Returns:</B><DD>A zip item name without any leading slashes.</DL>
</DD>
</DL>
<HR>

<A NAME="getZipURIFromOPCName(java.lang.String)"><!-- --></A><H3>
getZipURIFromOPCName</H3>
<PRE>
public static java.net.URI <B>getZipURIFromOPCName</B>(java.lang.String&nbsp;opcItemName)</PRE>
<DL>
<DD>Convert an OPC item name into a zip URI by removing any leading forward
 slash if it exist.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>opcItemName</CODE> - The OPC item name to convert.
<DT><B>Returns:</B><DD>A zip URI without any leading slashes.</DL>
</DD>
</DL>
<HR>

<A NAME="verifyZipHeader(java.io.InputStream)"><!-- --></A><H3>
verifyZipHeader</H3>
<PRE>
public static void <B>verifyZipHeader</B>(java.io.InputStream&nbsp;stream)
                            throws <A HREF="../../../../../../org/apache/poi/openxml4j/exceptions/NotOfficeXmlFileException.html" title="class in org.apache.poi.openxml4j.exceptions">NotOfficeXmlFileException</A>,
                                   java.io.IOException</PRE>
<DL>
<DD>Verifies that the given stream starts with a Zip structure.
 
 Warning - this will consume the first few bytes of the stream,
  you should push-back or reset the stream after use!
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../../../org/apache/poi/openxml4j/exceptions/NotOfficeXmlFileException.html" title="class in org.apache.poi.openxml4j.exceptions">NotOfficeXmlFileException</A></CODE>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="openZipStream(java.io.InputStream)"><!-- --></A><H3>
openZipStream</H3>
<PRE>
public static <A HREF="../../../../../../org/apache/poi/openxml4j/util/ZipSecureFile.ThresholdInputStream.html" title="class in org.apache.poi.openxml4j.util">ZipSecureFile.ThresholdInputStream</A> <B>openZipStream</B>(java.io.InputStream&nbsp;stream)
                                                        throws java.io.IOException</PRE>
<DL>
<DD>Opens the specified stream as a secure zip
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>stream</CODE> - The stream to open.
<DT><B>Returns:</B><DD>The zip stream freshly open.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="openZipFile(java.io.File)"><!-- --></A><H3>
openZipFile</H3>
<PRE>
public static java.util.zip.ZipFile <B>openZipFile</B>(java.io.File&nbsp;file)
                                         throws java.io.IOException</PRE>
<DL>
<DD>Opens the specified file as a secure zip, or returns null if no 
  such file exists
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>file</CODE> - The file to open.
<DT><B>Returns:</B><DD>The zip archive freshly open.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="openZipFile(java.lang.String)"><!-- --></A><H3>
openZipFile</H3>
<PRE>
public static java.util.zip.ZipFile <B>openZipFile</B>(java.lang.String&nbsp;path)
                                         throws java.io.IOException</PRE>
<DL>
<DD>Retrieve and open as a secure zip file with the specified path.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>path</CODE> - The file path.
<DT><B>Returns:</B><DD>The zip archive freshly open.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
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